Saturday, June 3, 2017

HP 20S and HP 21S: Minimum and Maximum of a Data Set

HP 20S and HP 21S: Minimum and Maximum of a Data Set

The input/output format is the same for both minimum and maximum:

1. Enter the initial data point, press XEQ A.
2. Enter subsequent points, press XEQ B.
3. To find the minimum or maximum, depending on which program you use, press XEQ C.

The key codes for both the HP 20S and HP 21S for these programs are the same.  Caution: this won’t always be the case.  The HP 20S has a row dedicated to conversions while the HP 21S has a row dedicated to statistics.

HP 20S and HP 21S: Minimum

 STEP CODE KEY 01 61, 41, A LBL A 02 21, 1 STO 1 03 61, 26 RTN 04 61, 41, B LBL B 05 21, 0 STO 0 06 31 INPUT 07 22, 1 RCL 1 08 61, 42 X≤Y? 09 51, 41, 1 GTO 1 10 71 Clear [ C ] 11 61, 26 RTN 12 61, 41, 1 LBL 1 13 51, 31 SWAP 14 21, 1 STO 1 15 71 Clear [ C ] 16 61, 26 RTN 17 61, 41, C LBL C 18 22, 1 RCL 1 19 61, 26 RTN

Example:
Data Set:  9, 3, 6, 5, 7, 2, 4
Minimum:  2 (stored in R1)

HP 20S and HP 21S: Maximum

 STEP CODE KEY 01 61, 41, A LBL A 02 21, 1 STO 1 03 61, 26 RTN 04 61, 41, B LBL B 05 21, 0 STO 0 06 31 INPUT 07 22, 2 RCL 2 08 51, 31 SWAP 09 61, 41 X≤Y? 10 51, 41, 2 GTO 2 11 71 Clear [ C ] 12 61, 26 RTN 13 61, 41, 2 LBL 2 14 21, 2 STO 2 15 71 Clear [ C ] 16 61, 26 RTN 17 61, 41, C LBL C 18 22, 2 RCL 2 19 61, 26 RTN

Example:
Data Set:  9, 3, 6, 5, 7, 2, 4
Maximum:  9 (stored in R2)

This is two of my favorite programs I posted this year.  I plan to make a version for the HP 12C soon.  They are simple and versatile.

Until next time, can you believe it’s June?

Eddie

This blog is property of Edward Shore, 2017.

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